Multiply the volume in liters (4.00L) by the concentration of the solution in molar (0.250M) to calculate the number of moles of soluto that you need, then multiply the number of moles by the molar mass of sodium hydroxide (39.99 g/mol) to calculate the mass.

4.00L x 0.250 M x 39.99g / 1L = 39.99g

Basically you need one mol of NaOH (39.99g) dissolved in 4 liters of solution.

4 0

3 years ago

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What is the oxidation state for the oxygen atom in na 2 o 2 ?

elixir [45]

$Na_{2}O_{2}

Na in compounds has oxidation number +1 only.

So, Na_{2}^{+1}O_{2}^{x}

2*(+1)+2x=0, x=-1.

Oxidation number oxygen in Na_{2}O_{2} is - 1.$

4 0

3 years ago

What will result from the Alpha decay of (17 8)O?

Nookie1986 [14]

Answer:

alpha decay, because alpha particles have two protons and two neutrons. If the isotope has an atomic number two less than the original, it lost two protons, the same amount as in an alpha particle.

Explanation:

3 0

2 years ago

Which types of orbitals are found in the principal energy level n = 4? A. S, d B. S, p, d, f C. S, p D. S, p, f E. S, d, f

Artist 52 [7]

s 32 so my answer is S P F

7 0

3 years ago